Medium
8.ii on Chaffoteaux Celtic 24 HE

Your boiler's pump is struggling to move water because trapped air is stuck inside the system and cannot escape.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Pump noisy - Air separator not venting

DIY fix possible

Locate the radiator bleed valve on your highest radiatorUse a bleed key to release any trapped air until water appearsCheck the boiler pressure gauge and top it up to 1.5 bar using the filling loop if it has dropped

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Related fault codes

8.iView →8.iiiView →

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